Class ChangePointOperator

java.lang.Object
org.elasticsearch.compute.operator.ChangePointOperator
All Implemented Interfaces:
Closeable, AutoCloseable, Operator, org.elasticsearch.core.Releasable

public class ChangePointOperator extends Object implements Operator
Find spikes, dips and change point in a list of values.

Warning: this operator cannot handle large amounts of data! It buffers all data that is passed to it, runs the change point detector on the data (which is a compute-heavy process), and then outputs all data with the change points.

  • Field Details

    • INPUT_VALUE_COUNT_LIMIT

      public static final int INPUT_VALUE_COUNT_LIMIT
      See Also:
  • Constructor Details

    • ChangePointOperator

      public ChangePointOperator(DriverContext driverContext, int channel, String sourceText, int sourceLine, int sourceColumn)
  • Method Details

    • needsInput

      public boolean needsInput()
      Description copied from interface: Operator
      whether the given operator can accept more input pages
      Specified by:
      needsInput in interface Operator
    • addInput

      public void addInput(Page page)
      Description copied from interface: Operator
      adds an input page to the operator. only called when needsInput() == true and isFinished() == false
      Specified by:
      addInput in interface Operator
    • finish

      public void finish()
      Description copied from interface: Operator
      notifies the operator that it won't receive any more input pages
      Specified by:
      finish in interface Operator
    • isFinished

      public boolean isFinished()
      Description copied from interface: Operator
      whether the operator has finished processing all input pages and made the corresponding output pages available
      Specified by:
      isFinished in interface Operator
    • getOutput

      public Page getOutput()
      Description copied from interface: Operator
      returns non-null if output page available. Only called when isFinished() == false
      Specified by:
      getOutput in interface Operator
    • close

      public void close()
      Description copied from interface: Operator
      notifies the operator that it won't be used anymore (i.e. none of the other methods called), and its resources can be cleaned up
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Specified by:
      close in interface Operator
      Specified by:
      close in interface org.elasticsearch.core.Releasable
    • toString

      public String toString()
      Overrides:
      toString in class Object